The bikini
Farrah Abraham wears on the cover of her sex tape, "Back Door Teen Mom," was pulled down from eBay for being dirty. But now, thanks to a porn company, someone gets to take it home for free.

Bidding for the two-piece was up over $13,000 when eBay jerked the listing down
for violation of its policy that requires garments to be washed before being suctioned off on its site. eBay is interested in protecting the health and hygiene of sex tape fans, you know.

Now
TMZ reports the website Pornhub bought the unwashed bikini from Vivid the company distributing the sex tape, and plans to give away the filthy item through an online contest. What a prize.

Abraham shot the graphic sex tape with porn star James Deen, and
raked in a reported $1.5 million for her troubles. The "Teen Mom" star says she's saving a copy of the tape to show her daughter when she hits the appropriate age -- 13 or 14-years-old -- at which point child protective services should surely become involved.

Farrah had a pregnancy scare after shooting the video, but later confirmed she was not with child ... which was pretty much assumed anyway, considering the tape is called "Back Door Teen Mom" for a reason.